Pierre-Emmanuel Chaput

Pierre-Emmanuel Chaput is a Professor at the Elie Cartan Institute of Lorraine (IECL), University of Lorraine, Nancy, France. He leads the geometry team within IECL and directs the Nancy component of the ANR GeoLie project ("geometric methods in Lie theory"). He is actively affiliated with the GDR "Algebraic Geometry and Complex Geometry" and the GDR "Algebraic and Geometric Lie Theory".

His research centers on algebraic geometry, representation theory, and algebraic combinatorics, with Schubert calculus as a core specialization. He investigates the geometry of homogeneous spaces through cohomology (quantum, equivariant, and K-theoretic variants), rational curve spaces, and combinatorial structures like Littlewood-Richardson formulas. His work employs tools such as jeu de taquin, puzzles, and Soergel bimodules to explore connections between intersection cohomology, Kazhdan-Lusztig theory, and Weyl group combinatorics.

Chaput supervises PhD students Dimitry Kfoury (researching Pieri formulas for affine Grassmannians since 2016) and Simon Jacques (co-supervised with Lucas Fresse on orbital variety characteristic polynomials since 2017). He has hosted postdoctoral researchers including Thomas Gobet (ANR GeoLie-funded, 2017–2018) and Christoph Bärligea (DFG-funded, since 2017). He co-organized the February 2020 Nancy conference on algebraic groups and representation theory and leads working groups on Kac-Moody theory and intersection cohomology.